General Practice 2022

Urticária colinérgica: what é, symptoms and treatment

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Urticária colinérgica: what é, symptoms and treatment
Urticária colinérgica: what é, symptoms and treatment

Cholinergic urticaria, popularly known as heat allergy, is a type of skin allergy that arises after an increase in body temperature, which can happen in periods of heat or physical activity, for example, resulting in in the appearance of small red bumps and a lot of itching at the site, these symptoms being more often observed on the back and neck.

It is important that the dermatologist or immunoallergologist be consulted so that an evaluation of the symptoms is carried out and, thus, it is possible to indicate the best treatment. To treat this change, it is necessary to lower the body temperature with a cold bath, for example, in addition to the use of antiallergic medication or ointments, which must be used according to the doctor's guidance.

Symptoms of cholinergic urticaria

Cholinergic urticaria usually appears in teenagers and adults, but it can happen in people of all ages and is characterized by the appearance of small lumps, plaques or reddish spots on the body that are very itchy. In addition to these symptoms, other associated symptoms may arise, including:

  • Swelling of the skin or lips, eyes, or throat, also known as angioedema;
  • Cough or shortness of breath;
  • Stomach pain, nausea or diarrhea;
  • Decrease in blood pressure.

When these symptoms are identified, it is recommended to go to the emergency room due to the risk of breathing difficulties due to the swelling of the throat and lungs.

In babies and in some predisposed people, there is also another type of reaction to heat, but it happens when sweat caused by heat clogs and inflames the pores and causes a reaction with lumps and itching on the skin, known as prickly heat.See how to identify and treat prickly heat.

To diagnose this type of allergy, the dermatologist must observe the characteristics of the skin reaction, but it may be necessary to carry out a test with local heating, such as contact with hot water for a few minutes, for example, or observe the skin reaction when the person performs a few minutes of physical activity.

Main causes

In cholinergic urticaria, the onset of symptoms is related to situations that promote an increase in body temperature, such as intense physical exercise, hot baths, excessive heat, stress, consumption of hot and spicy drinks and foods, and contact with substances warm, like compresses, for example.

This type of allergy is part of the group of hives that are triggered by physical stimuli, such as heat, sun, cold, contact with products and sweat, and it is common for a person to have more than one type. Here's how to identify other types of hives and how to treat them.

How the treatment is done

Cholinergic urticaria has no cure, but its symptoms can be relieved, and it is necessary to follow the dermatologist's guidelines, which usually include the use of some antiallergic drugs, such as Hydroxyzine and Cetirizine, which can be combined with ointments to enhance the effect, such as Betamethasone.

In addition, it is essential to cool the body, with a cold shower or go to a ventilated place, for example. In some people, stress, consumption of alcoholic beverages or use of other medicines can also trigger or worsen the crises, and should be avoided.

Reactions usually last about a few minutes to 24 hours, but in some people they can be chronic and persist longer. Thus, in people with very intense and repetitive hives, it may be necessary to carry out a longer treatment, with antiallergic drugs or corticosteroids for a longer time, to stabilize immunity.

Home treatment for cholinergic urticaria

The natural treatment for cholinergic urticaria can be performed in cases of mild reactions or as a complement to the treatment in more intense cases, and can be done with cold compresses of chamomile, pansy plant or flaxseed porridge, 2 times a day. day. Check out some home remedies for skin allergies.

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